PBS Nova is a popular science television series produced by WGBH Boston. It explores various scientific topics and discoveries through in-depth documentaries and interviews with experts in the field.
The sketches on gravity, dark matter, and strings are short animated segments that are featured in episodes of PBS Nova. These sketches aim to provide a visual representation of complex scientific concepts and theories in a fun and engaging way.
Gravity is a fundamental force of nature that causes objects with mass to be attracted to one another. It is responsible for keeping planets in orbit around the sun and for the formation of galaxies. The strength of gravity is determined by the mass and distance between objects.
Dark matter is a type of matter that makes up about 85% of the total mass in the universe. It does not emit or absorb light, making it invisible to telescopes and other instruments. Its existence is inferred through its gravitational effects on visible matter.
Strings are a theoretical concept in physics that propose that all particles in the universe are made up of tiny, vibrating strings. This theory, known as string theory, attempts to reconcile the laws of quantum mechanics and general relativity to create a unified theory of everything.